What is the air quality trend in Chiang Rai?

Over the past 7 days, Chiang Rai had an average AQI of 184 based on station measurements. The worst day was with AQI .

How is Chiang Rai air quality measured?

Air quality in Chiang Rai is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Chiang Rai, Thailand

Name: Chiang Rai Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Chiang Rai, Thailand.

166

Current AQI
Unhealthy

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

109h · 40 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-10	167	156–184	86.1 µg/m³	90.1	21h	41
2026-04-09	168	155–173	88.8 µg/m³	91.8	17h	38
2026-04-08	155	147–158	64.3 µg/m³	64.0	11h	36
2026-04-07	165	156–180	83.3 µg/m³	87.9	24h	43
2026-04-06	174	164–194	100.5 µg/m³	104.2	18h	37
2026-04-04	248	230–270	198.2 µg/m³	214.8	15h	37
2026-04-03	217	215–221	166.7 µg/m³	188.5	3h	37

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